Tettfel



l UNITED STATES PATENT (.)EEICE` ERIEDRIoH HASDENTEUEEL, oE IsERLoHN, PRUssIA, GERMANY.

SPECIFICATION vfmmn'ng part of Letters Patentflvo. 224,288, dated February 10,1880.,

Application med Aguet 14, 1879i To all whom itV may concern: l

Be it known that I, `FRIEnRIcH HAsDEN- TEUFEL, of Iserlohn, Prussia, in the Empire of Germany, have invented a new and Improved Lock for Doors, Ste., of which the following is a speciiication.

In the accompanying drawings, Figure l is a face view of my improved lock, with one of the face-plates removed, showing the bolt withdrawn. Fig. 2 is a similar view, showing the bolt shotout. Fig. Sis a sectional side viewof the key and sleeve used with my improved lock. Fig. 4 is an end-view of the same; Fig.. 5, a detail side view of the sleeve. Fig. 6 is a transverse section of the lock on the jline o c, Fig. 2 and'Fig. 7, a face view of one of the face-plates. e

Similar letters of reference indicate corresponding parts in all the figures. l

This invention relates to an improved lock for doors and analogous purposes, which lock is of simple construction, positive in -its motion, and diflicult to pick.`

The invention consists in the new arrangement and construction of bolts and of sleeve for the key, as hereinafter more fully described.

In the accompanying drawings, the letters Va b represent the two face-platesv of my improved lock, which areV separated by the rim d, forming alock-case, in the ordinary manner. The plate a is preferably removable, and is not represented in Figs. l and 2, but is sepa-l rately shown in Fig. 7. Within the lock-case is placed the main sliding bolt e, which maybe slid in and 0ut-by means of a key, in manner hereinafter described.

f is a tumbler-plate placed beneath the boltv e. This plate is cut out in the middle, so that the key g may be passed .through it to operate vthe lock. The plate f is of circular form, with a notch at one side, said notch leading to the central opening, serving to form two hooks, It and i, as shown. Between these two hooks enters a toe-piece, j, that projects downward from the bolt c. It is evident that when the tumbler-plate f is oscillated in its proper bearings to the right or left by means of the keyl Y g the lock will be closed or opened, as the/ hooks z' or h move the bolt e out or in by means of its toe-piecej. To turn the tumbler-plate in locking, the key strikes the edge or shoul- Y 'der @and to turnfit for unlocking the'key Vstrikes the edge or plate.A

shoulder w ofthe ltumbler-` listhelatch-boltof the lock. This latchbolt is situated above the Inainf'bolte, and is operated substantially on 'the same principle as rsaid main bolt. Ithas a downwardlyprojectingtoe-piece, m, which is acted upon bytwo hooks, a: and y,1hat"project from a tumbler-piece, n. The tumbler n is perforated for the admission of Vthe knob-spindle, by which saidtumbler is oscillated. .lhe'tumbler 'n extends downward to within a short distance from the bolt e, and is provided at its lower extremity with a recess, c, into which fits a hook, o, that extends from the bolt c, as shown. When the bolt e is in the locked position, as in Fig. 2, its hook o enters the recessv c of the tumbler u and prevents said tumbler from being oscillated by the knob-spindle. It thereby prevents the turning of the knobspindle and the opening of the latch. As soon 'as the bolt'e is carried inward and the lock opened',Fig. 1, the hook o is disengaged from the recess fu, allowing the latch-bolt Z to be moved independently of the bolt e.

A pendent weight,p, or an equivalent spring,

assists the tumbler n in dropping intthe po sition shown in Fig. 2, and to throw out the latch whenever the bolt c is inv the unlocked l ripheryof the tumbler fis notched or recessed,l

as at u, at vthe place which is directly opposite the plate q when the lock is closed, said notch I corresponding in size and form to the curved portion ofthe plate g. When the lock is closed the plate q can, by its key or spindle, be turned into the position shown in Fig. 2, in which its curvedr portion enters the slot or recess u of `the tumbler j' and prevents such tumbler from being oscillated. It will now be impossible to open the lock before the plate q is rst swung into the position shown in Fig. l, in ,which its -curved portion is withdrawn from the recess u of the tumbler f.` Small projections or shoul- IOO ders on the plate q strike against a stop; z, in the lock-ease and prevent the plate q from being revolved too far in opening or closing said night-latch.

r is a short cylindrical sleeve placed between the face-plates a bin line with the key-hole. This sleeve has for its object to give additional security against opening the loc-k with false keys. It is of a diameter to admit the key-stem, and is provided with a longitudinal slot traversed by a bridge, s, as clearly shown in Figs. 3 and 5. This bridge arrests the longitudinal motion of the key when inserted into the lock, and is about midway between the ends of the sleeve, to have the same effect from whatever side the key is inserted. If the lock is to be operated from one side only, the bridge may be at or near the end of the sleeve.

The bit of the key is L-shaped, as shown in Fig. 3,l so that its upper narrow part strikes the bridge s, while its lower part extends farther into the lock-far enough, in fact, to reach the contact edges or shoulders t and w of the tumbler f. A false key, unless provided with a bit extending farther into the lock tllan the bridge s will allow, cannot be used for picking the lock. The sleeve turns with the key in opening or closing the lock, and is provided with beariu gs at the ends to give it proper support and allow it to berevolved in the plates a b.

I claiml. The combination of the circular rotated tumbler f, having hooks h and t', with the bolt e, having projecting toej, that extends between said hooks, substantially as specified.

2. The combination of the bolt e, having hook-shaped projection o, with the tumbler n of the latch-bolt, having recess @,all arranged so that when the bolt e is locked the hook 0 will lso lock the tumbler fn, substantially as speci- 3. The combination of the bolt e and circular tumbler f, having recess u, with the semicircular plate g, all arranged so that when the bolt e is locked the recess u is opposite the plate q, substantially as and for the purpose specified.

This specification signed by me this 8th day ot' April, 1879.

`FRIEDRICH HASDENTEUFEL.

Witnesses:

FRIEDRICH CARL GLASER, CARL T. BURGHARDT. 

